The college was placed in a lockdown with a spokesperson saying that this was while a 'threat' was being investigated. A college spokesperson said: "The college was in lockdown while we investigated a threat. "The site is now reopen, and buses are leaving shortly to get students home. The college, which has over 3,000 full-time students, opened in 1991. Anyone with any information or who has photos which can be published can email James Felton at James.Felton@newsquest.co.uk